add README for explanation

Author: Its-Just-Nans

android/README.md

@@ -0,0 +1,14 @@
+# eframe in android
+
+This part of the repo will build an android app using a `cdylib` named `eframe_template_android`. This `cdylib` will be used by the android app to render the UI.
+
+The chain is: `eframe_template` used in `eframe_template_android` used in `eframe_template` (android app)
+
+## Building the android app
+
+```sh
+# will compile the cdylib and copy it to the android app
+make
+
+make run-on-device
+```